I usually take a whole sweet onion, cut the bottom off and cut cross-ways multiple times (like slices of pizza or outback awesome blossom), set in small piece of aluminum foil slightly wrapped (like a bowl), open up the crisscross cuts and add spices (black pepper, garlic powder, chili powder, sea salt) and a large pat (1-2 TBS) of butter, slide it on the grill next to the steaks. I usually do in my smoker for an hour or so with lower heat to get all that smokey goodness.
corn on the cob ... in shucks, soak in water for 20-30 minutes, put on the grill with the steaks for 12-13 minutes, rotate 1/4 turn, 12-13 minutes, repeat on all 4 sides. Can do similar by removing shucks, wrap in aluminum foil with a little butter, salt & pepper (can add onion and/or garlic powder), 12-13 minutes rotate 1/4 turn, repeat all 4 sides.
veggie k-bobs... mushroom caps, zucchini, yellow squash, onion slices, cherry tomatoes.
rice-a-ronni (the San Francisco treat) works pretty well too and very easy prep, or Zatarains Jambalaya mix with a few link sausage chopped up...